Same-sex sexual behavior and evolution
... male–male courtship. Males that lack functional copies of either gene cannot accurately distinguish the sexes using sex-specific pheromones, and therefore court males as well as females. However, the neural pathways and brain centers that are affected differ markedly between the two types of mutants ...
... male–male courtship. Males that lack functional copies of either gene cannot accurately distinguish the sexes using sex-specific pheromones, and therefore court males as well as females. However, the neural pathways and brain centers that are affected differ markedly between the two types of mutants ...
Same-sex sexual behavior and evolution Nathan W. Bailey and Marlene Zuk Review
... male–male courtship. Males that lack functional copies of either gene cannot accurately distinguish the sexes using sex-specific pheromones, and therefore court males as well as females. However, the neural pathways and brain centers that are affected differ markedly between the two types of mutants ...
... male–male courtship. Males that lack functional copies of either gene cannot accurately distinguish the sexes using sex-specific pheromones, and therefore court males as well as females. However, the neural pathways and brain centers that are affected differ markedly between the two types of mutants ...
Same-sex sexual behavior and evolution
... male–male courtship. Males that lack functional copies of either gene cannot accurately distinguish the sexes using sex-specific pheromones, and therefore court males as well as females. However, the neural pathways and brain centers that are affected differ markedly between the two types of mutants ...
... male–male courtship. Males that lack functional copies of either gene cannot accurately distinguish the sexes using sex-specific pheromones, and therefore court males as well as females. However, the neural pathways and brain centers that are affected differ markedly between the two types of mutants ...
SEXUAL SELECTION AND THE DESCENT OF MAN 1871-1971
... widely than female reproductive success. Only four per cent of the females failed to produce any surviving offspring, while 21 per cent of the males so failed. Some males, on the other hand, were phenomenally successful, producing nearly three times as many offspring as the most successful female. ( ...
... widely than female reproductive success. Only four per cent of the females failed to produce any surviving offspring, while 21 per cent of the males so failed. Some males, on the other hand, were phenomenally successful, producing nearly three times as many offspring as the most successful female. ( ...
Parental Investment and Sexual Selection
... widely than female reproductive success. Only four per cent of the females failed to produce any surviving offspring, while 21 per cent of the males so failed. Some males, on the other hand, were phenomenally successful, producing nearly three times as many offspring as the most successful female. ( ...
... widely than female reproductive success. Only four per cent of the females failed to produce any surviving offspring, while 21 per cent of the males so failed. Some males, on the other hand, were phenomenally successful, producing nearly three times as many offspring as the most successful female. ( ...
Mate choice turns cognitive
... A central question in sexual selection theory has been to what extent biological fitness (survival and reproduction ability) remains genetically heritable in most speciesa–k. If fitness is highly heritable, individual variation in survival and reproduction prospects are heavily influenced by genetic ...
... A central question in sexual selection theory has been to what extent biological fitness (survival and reproduction ability) remains genetically heritable in most speciesa–k. If fitness is highly heritable, individual variation in survival and reproduction prospects are heavily influenced by genetic ...
Sexually transmitted infections in polygamous mating systems
... in rates of sexual activity and in patterns of sexual contact. Polygynous and polyandrous mating systems are particular examples, where one sex tends to have a much higher variance in partner acquisition rate compared with the other sex. It is well-established that the structure of a mating system c ...
... in rates of sexual activity and in patterns of sexual contact. Polygynous and polyandrous mating systems are particular examples, where one sex tends to have a much higher variance in partner acquisition rate compared with the other sex. It is well-established that the structure of a mating system c ...
Money, Sex and Happiness: An Empirical Study
... as seems plausible, that u(…) is a function that is observable only to the individual. Its structure cannot be conveyed unambiguously to the interviewer or any other individual. The error term, e, then subsumes among other factors the inability of human beings to communicate accurately their happine ...
... as seems plausible, that u(…) is a function that is observable only to the individual. Its structure cannot be conveyed unambiguously to the interviewer or any other individual. The error term, e, then subsumes among other factors the inability of human beings to communicate accurately their happine ...
- University of Warwick
... oppression. Broadly speaking, research on sensitive topics has had contradictory outcomes. On one hand, difficulties associated with sensitive research have tended to inhibit adequate conceptualisation and measurement (Herzberger, 1993). For instance, it is difficult to assess accurately the number ...
... oppression. Broadly speaking, research on sensitive topics has had contradictory outcomes. On one hand, difficulties associated with sensitive research have tended to inhibit adequate conceptualisation and measurement (Herzberger, 1993). For instance, it is difficult to assess accurately the number ...
Female Agency and Oppression in Caribbean Bacchanalian Culture
... in this topic stems primarily from thought-provoking and Belinda Cooper by scholars such as Carolyn the most ...
... in this topic stems primarily from thought-provoking and Belinda Cooper by scholars such as Carolyn the most ...
The Ape That Thought It Was a Peacock: Does Evolutionary
... pair bonding if they failed in this strategy, whereas women evolved to be choosier than men about their sexual partners, and to favor long-term pair bonds with men who helped provide for their offspring. Men court women and compete with one another to gain sexual access to as many women as possible. ...
... pair bonding if they failed in this strategy, whereas women evolved to be choosier than men about their sexual partners, and to favor long-term pair bonds with men who helped provide for their offspring. Men court women and compete with one another to gain sexual access to as many women as possible. ...
100 Sexual Development
... told her the truth about her gender reassignment, following advice from Brenda's endocrinologist and psychiatrist. Now 15, Brenda decided to assume a male gender identity, calling himself David. After learning of the new relationship with his ex-sister, Brian began to experience a pattern of mental ...
... told her the truth about her gender reassignment, following advice from Brenda's endocrinologist and psychiatrist. Now 15, Brenda decided to assume a male gender identity, calling himself David. After learning of the new relationship with his ex-sister, Brian began to experience a pattern of mental ...
Demography can favour female
... spatial variation in habitat creates scenarios where it is no longer safe to ignore female demographic dominance when arguing about sexual conflict or sex ratio dynamics. Our two models consider subpopulations that are linked via dispersal in spatially varying habitats. This creates conditions where ...
... spatial variation in habitat creates scenarios where it is no longer safe to ignore female demographic dominance when arguing about sexual conflict or sex ratio dynamics. Our two models consider subpopulations that are linked via dispersal in spatially varying habitats. This creates conditions where ...
Ape That Thought It Was a Peacock
... pair bonding if they failed in this strategy, whereas women evolved to be choosier than men about their sexual partners, and to favor long-term pair bonds with men who helped provide for their offspring. Men court women and compete with one another to gain sexual access to as many women as possible. ...
... pair bonding if they failed in this strategy, whereas women evolved to be choosier than men about their sexual partners, and to favor long-term pair bonds with men who helped provide for their offspring. Men court women and compete with one another to gain sexual access to as many women as possible. ...
Hormonal
... Contraception: preventing conception by blocking the female’s egg from uniting with the male’s sperm ...
... Contraception: preventing conception by blocking the female’s egg from uniting with the male’s sperm ...
the evolutionary ecology of gynogenesis
... For gynogens of hybrid origin it is usually assumed that they acquire all characteristic features of gynogenesis at once. Two scenarios for the evolution of gynogenesis with hybrid origin seem possible: 1) Single step. Here multiple evolutionary changes occur simultaneously. This includes disruption ...
... For gynogens of hybrid origin it is usually assumed that they acquire all characteristic features of gynogenesis at once. Two scenarios for the evolution of gynogenesis with hybrid origin seem possible: 1) Single step. Here multiple evolutionary changes occur simultaneously. This includes disruption ...
Male mating success and survival in the field with respect to size
... It has been suggested that the proportions of copulating and solitary males can be used to estimate the variance in male mating success (e.g., Arnold and Wade, 1984b). However, in our case the males were scanned only once. Since even the most attractive can not be in copula constantly, this approach ...
... It has been suggested that the proportions of copulating and solitary males can be used to estimate the variance in male mating success (e.g., Arnold and Wade, 1984b). However, in our case the males were scanned only once. Since even the most attractive can not be in copula constantly, this approach ...
The female condom: knowledge, attitude, and willingness to use
... It was also interesting to analyse the reasons why people don’t want to use it. Women reported more objective difficulties (“difficult insertion” and “trouble during sexual intercourse”), while men reported reasons having more to do with psychological issues. Therefore, it could be argued that while ...
... It was also interesting to analyse the reasons why people don’t want to use it. Women reported more objective difficulties (“difficult insertion” and “trouble during sexual intercourse”), while men reported reasons having more to do with psychological issues. Therefore, it could be argued that while ...
Homosexuality in “Traditional” Sub-Saharan Africa
... feminine roles. Called ashtime, these (biological) males dressed like women, performed female tasks, cared for their own houses, and apparently had sexual relations with men,” according to Donald Donham (1990:92), who wrote, “In 1975 I was aware of only one ashtime in Maaleland, although informants ...
... feminine roles. Called ashtime, these (biological) males dressed like women, performed female tasks, cared for their own houses, and apparently had sexual relations with men,” according to Donald Donham (1990:92), who wrote, “In 1975 I was aware of only one ashtime in Maaleland, although informants ...
as a PDF
... than the orgasmic women in the control groups was supported. Furthermore, results of the present study replicate previous research (Kelly et al., 1990) in demonstrating that this difference relates most strongly to communication regarding direct clitoral stimulation activities (cunnilingus and manua ...
... than the orgasmic women in the control groups was supported. Furthermore, results of the present study replicate previous research (Kelly et al., 1990) in demonstrating that this difference relates most strongly to communication regarding direct clitoral stimulation activities (cunnilingus and manua ...
Phenotypic correlates of male reproductive success in western gorillas
... Sexual dimorphism is generally expected to arise from sexual selection, but it can also arise from other factors such as predation (Darwin, 1871; Andersson, 1994; Plavcan, 2001; Lawler, 2009). Sexual dimorphism is generally considered as evidence that selection has occurred in the past, but it does ...
... Sexual dimorphism is generally expected to arise from sexual selection, but it can also arise from other factors such as predation (Darwin, 1871; Andersson, 1994; Plavcan, 2001; Lawler, 2009). Sexual dimorphism is generally considered as evidence that selection has occurred in the past, but it does ...
Age-advertisement and the evolution of the peacock`s train
... crests, pectoral bibs or elongated tail feathers. Outstanding among these speciesis the blue peacock (Pauo cristatus) with its long covert feathers, most of which end in vividly coloured ocelli. Such structures are probably costly, so how did they evolve? There are four possible answers which invoke ...
... crests, pectoral bibs or elongated tail feathers. Outstanding among these speciesis the blue peacock (Pauo cristatus) with its long covert feathers, most of which end in vividly coloured ocelli. Such structures are probably costly, so how did they evolve? There are four possible answers which invoke ...
Local adaptation and the evolution of female choice
... be evolutionarily unstable, because individuals responding to the signal pay a cost for their preference but gain no benefits. Even signalling systems that are ‘honest on average’ (i.e. strong signals are associated with high quality individuals more often than not, such that the signal provides use ...
... be evolutionarily unstable, because individuals responding to the signal pay a cost for their preference but gain no benefits. Even signalling systems that are ‘honest on average’ (i.e. strong signals are associated with high quality individuals more often than not, such that the signal provides use ...
Do exaggerated sexual swellings function in female mating
... of the hypothesis that focuses on aspects of female mating competition, based on the following predictions: (1) Increases in the adult sex ratio (females per male) are expected over evolutionary origins of exaggerated swellings, under the assumption that a higher ratio of females to males indicates ...
... of the hypothesis that focuses on aspects of female mating competition, based on the following predictions: (1) Increases in the adult sex ratio (females per male) are expected over evolutionary origins of exaggerated swellings, under the assumption that a higher ratio of females to males indicates ...